Tag: Java 7 Update 21

Timeline :

Vulnerability discovered and reported to Packet Storm by Name Withheld
Vulnerability corrected by vendor the 2013-06-18
PoC provided by Packet Storm the 2013-08-12
Metasploit PoC provided the 2013-08-19

Affected version(s) :

Tested on Windows XP Pro SP3 with :

Java SE 7 Update 17

Description :

This module abuses an Invalid Array Indexing Vulnerability on the static function storeImageArray() function in order to cause a memory corruption and escape the Java Sandbox. The vulnerability affects Java version 7u21 and earlier. The module, which doesn’t bypass click2play, has been tested successfully on Java 7u21 on Windows and Linux systems.

PoC provided by :

Reference(s) :

Affected version(s) :

Oracle Java SE 7 Update 21 and before

Tested on Windows XP Pro SP3 with :

Java SE 7 Update 17

Description :

This module abuses the insecure invoke() method of the ProviderSkeleton class that allows to call arbitrary static methods with user supplied arguments. The vulnerability affects Java version 7u21 and earlier.

Oracle has provide his Java Critical Patch Update (CPU) for April 2013 who has been released on Tuesday, April 16. On the 42 security vulnerabilities fixed in this CPU, 39 of them may be remotely exploitable. The highest CVSS Base Score for vulnerabilities in this CPU is 10.0.

This update fix the vulnerabilities exploited by James Forshaw (tyranid), Joshua J. Drake and VUPEN Security during Pwn20wn 2013. But this update is also fixing vulnerabilities reported by Adam Gowdiak of Security Explorations and other security researchers.

As you may know Oracle is using CVSS 2.0 (Common Vulnerability Scoring System) in order to score the reported vulnerabilities. But as you also may know security researchers disagree with the usage of CVSS by Oracle. Oracle play with CVSS score by creating a “Partial+” impact rating how don’t exist in CVSS 2.0, and by interpreting the “Complete” rating in a different way than defined in CVSS 2.0.

Affected products are:

JDK and JRE 7 Update 17 and earlier

JDK and JRE 6 Update 43 and earlier

JDK and JRE 5.0 Update 41 and earlier

JavaFX 2.2.7 and earlier

Proposed updates are:

JDK and JRE 7 Update 21

JDK and JRE 6 Update 45

JDK and JRE 5.0 Update 43

JavaFX 2.2.21

19 (45,24%) of the vulnerabilities have a CVSS base score of 10.0, 28 (66,67%) of the vulnerabilities have a high CVSS base score (CVSS => 7.0), 13 (30,95%) of the vulnerabilities have a medium CVSS base score (CVSS >= 4.0 < 7.0) and 1 (2,38%) of the vulnerabilities has a low CVSS base score (CVSS < 4.0). Also 25 (59,52%) of the vulnerabilities affects Java SE 6 and 42 (100%) of the vulnerabilities are affecting Java SE 7.

Also some modifications have been done in the Security Levels provided by Oracle. Previously five levels were existing (Very-High, High, Medium, Low and Custom), in the new provided version only three levels are still existing (Very-High, High and Medium).